BZX79C Series
Excel Semiconductor
www.excel-semi.com Rev. 3f, 1-Jun-2008
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Zener diode
Features
High reliability
Applications
Voltage stabilization
Absolute Maximum Ratings
Tj=25℃
Parameter Test Conditions Type Symbol Value Unit
Power dissipation I=4mm TL≤25℃ P
V 500 mW
Z-current IZ PV/VZ mA
Junction temperature Tj 175 ℃
Storage temperature range Tstg -65~+175 ℃
Maximum Thermal Resistance
Tj=25℃
Parameter Test Conditions Symbol Value Unit
Junction ambient I=4mm TL=constant RthJA 350 K/W
Stresses exceeding maximum ratings may damage the device. Maximum ratings are stress ratings only. Functional operation above the
recommended operating conditions is not implied. Extended exposure to stresses above the recommended operating conditions may
affect device reliability.
Electrical Characteristics
Tj=25℃
Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=10mA VF 0.9 V
BZX79C Series
Excel Semiconductor
www.excel-semi.com Rev. 3f, 1-Jun-2008
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Type VZnom IZT for V
ZT and rzjT rzjK at I
ZK IR and IR at VR TKVZ
BZX79C V mA V Ω Ω mA µA V %/K
2V4 2.4 5 2.2~2.6 <100 <600 1 <50 1 -0.09~-0.06
2V7 2.7 5 2.5~2.9 <100 <600 1 <20 1 -0.09~-0.06
3V0 3.0 5 2.8~3.2 <95 <600 1 <10 1 -0.08~-0.05
3V3 3.3 5 3.1~3.5 <95 <600 1 <5 1 -0.08~-0.05
3V6 3.6 5 3.4~3.8 <90 <600 1 <5 1 -0.08~-0.05
3V9 3.9 5 3.7~4.1 <90 <600 1 <3 1 -0.08~-0.05
4V3 4.3 5 4.0~4.6 <90 <600 1 <3 1 -0.06~-0.03
4V7 4.7 5 4.4~5.0 <80 <500 1 <3 1 -0.05~+0.02
5V1 5.1 5 4.8~5.4 <60 <480 1 <2 1 -0.02~+0.02
5V6 5.6 5 5.2~6.0 <40 <400 1 <1 1 -0.05~+0.05
6V2 6.2 5 5.8~6.6 <10 <150 1 <3 2 0.03~0.06
6V8 6.8 5 6.4~7.2 <15 <80 1 <2 3 0.03~0.07
7V5 7.5 5 7.0~7.9 <15 <80 1 <1 5 0.03~0.07
8V2 8.2 5 7.7~8.7 <15 <80 1 <0.7 6 0.03~0.08
9V1 9.1 5 8.5~9.6 <20 <100 1 <0.5 7 0.03~0.09
10 10 5 9.4~10.6 <20 <150 1 <0.2 7.5 0.03~0.1
11 11 5 10.4~11.6 <20 <150 1 <0.1 8.5 0.03~0.11
12 12 5 11.4~12.7 <25 <150 1 <0.1 9 0.03~0.11
13 13 5 12.4~14.1 <30 <170 1 <0.1 10 0.03~0.11
15 15 5 13.8~15.6 <30 <200 1 <0.05 11 0.03~0.11
16 16 5 15.3~17.1 <40 <200 1 <0.05 12 0.03~0.11
18 18 5 16.8~19.1 <45 <225 1 <0.05 13 0.03~0.11
20 20 5 18.8~21.2 <55 <225 1 <0.05 15 0.03~0.11
22 22 5 20.8~23.3 <55 <250 1 <0.05 16 0.04~0.12
24 24 5 22.8~25.6 <70 <250 1 <0.05 18 0.04~0.12
27 27 2 25.1~28.9 <80 <3001) 1 <0.05 20 0.04~0.12
30 30 2 28~32 <80 <3001) 1 <0.05 22 0.04~0.12
33 33 2 31~35 <80 <3251) 1 <0.05 24 0.04~0.12
36 36 2 34~38 <90 <3501) 1 <0.05 27 0.04~0.12
39 39 2 37~41 <130 <3501) 0.5 <0.05 28 0.04~0.12
43 43 2 40~46 <150 <3751) 0.5 <0.05 32 0.04~0.12
47 47 2 44~50 <170 <3751) 0.5 <0.05 35 0.04~0.12
51 51 2 48~54 <180 <4001) 0.5 <0.05 38 0.04~0.12
56 56 2 52~60 <200 <4251) 0.5 <0.05 39 0.04~0.12
62 62 2 58~66 <215 <4501) 0.5 <0.05 43 0.04~0.12
68 68 2 64~72 <240 <4751) 0.5 <0.05 48 0.04~0.12
75 75 2 70~79 <255 <5001) 0.5 <0.05 53 0.04~0.12
1) at Iz=2.0mA
BZX79C Series
Excel Semiconductor
www.excel-semi.com Rev. 3f, 1-Jun-2008
FaxBack +86-512-66607370 3/6
Characteristics (Tj=25℃ unless otherwise specified)
Figure 1. Typical Thermal Resistance Figure 2. Typical Forward Characteristics
Figure 3. Temperature coefficients
(-55℃ to +150℃ temperature range; 90% of the units are in the ranges indicated.)
Figure 4. Effect of zener current on zener impedance Figure 5. Effect of zener voltage on zener impedance
BZX79C Series
Excel Semiconductor
www.excel-semi.com Rev. 3f, 1-Jun-2008
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Figure 6. Zener Voltage versus Zener Current – Vz=1 thru 16 Volts
Figure 7. Zener Voltage versus Zener Current – Vz=15 thru 30 Volts
BZX79C Series
Excel Semiconductor
www.excel-semi.com Rev. 3f, 1-Jun-2008
FaxBack +86-512-66607370 5/6
Figure 8. Zener Voltage versus Zener Current – Vz=30 thru 75 Volts
BZX79C Series
Excel Semiconductor
www.excel-semi.com Rev. 3f, 1-Jun-2008
FaxBack +86-512-66607370 6/6
Dimensions in mm
Standard Glass Case
JEDEC DO-35
Marking
Z
9
V
B
7
5
X
C
1
Cathode Anode
26 min. 26 min. 4.2 max.
Φ0.55 max.
Φ2.0 max.
Cathode identification Type No.
B
7
Z
9
X
C
